/*
 * Copyright (C) 2009 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;

/**
 * An unhashable object to be used in testing as values in our collections.
 *
 * @author Regina O'Dell
 */
@GwtCompatible
public class UnhashableObject implements Comparable<UnhashableObject>
{
    private final int value;

    public UnhashableObject(int value)
    {
        this.value = value;
    }

    @Override
    public boolean equals(Object object)
    {
        if (object instanceof UnhashableObject)
        {
            UnhashableObject that = (UnhashableObject) object;
            return this.value == that.value;
        }
        return false;
    }

    @Override
    public int hashCode()
    {
        throw new UnsupportedOperationException();
    }

    // needed because otherwise Object.toString() calls hashCode()
    @Override
    public String toString()
    {
        return "DontHashMe" + value;
    }

    @Override
    public int compareTo(UnhashableObject o)
    {
        return (this.value < o.value) ? -1 : (this.value > o.value) ? 1 : 0;
    }
}
